/Engine/Source/Runtime/LevelSequence/Public/LevelSequenceActor.h
Assigns an set of actors to all the bindings tagged with the specified name in this sequence. Object Bindings can be tagged within the sequence UI by RMB -> Tags... on the object binding in the tree.
void SetBindingByTag ( [FName](API\Runtime\Core\UObject\FName) BindingTag, const [TArray](API\Runtime\Core\Containers\TArray)< [AActor](API\Runtime\Engine\GameFramework\AActor) * > & Actors, bool bAllowBindingsFromAsset )